Designers develop images to represent the ideas their clients want to communicate. Images can be incredibly powerful tools of communication, conveying not only information but also moods and emotions.People respond to images instinctively based on their personalities, associations, and previous experience.For example, you know that a chilli is hot, and this knowledge in combination with the image creates a visual pun.
All image files can be categorized into two kinds, Vector-based files and Bitmap-based
The two differ in the way computers analyze their content. Vector-based images
Each element is defined mathematically by the computer.
Vector-based files are more suitable for illustrations that require precise measurements.
They are also easily scalable due to their mathematical nature. However, the vector-based file format has its drawbacks as well. It is not good for displaying photo-realistic images such as a photograph because images of this type generally do not contain well-defined shapes and curves.
File names for vector-based images usually consist of extensions such as *.EPS, *.AI, *CDR, or *.DWG.
Bitmap-based images
Do not rely on mathematical formulas to define their various elements.
Each bitmap-based image is mapped into a grid. The size of the grid is based on the image's resolution. For example, a bitmap-based image of 1 inch x 1 inch with a 600 dpi resolution would be defined by a grid of 600 x 600 pixels.
A bitmap-based image is like a mosaic of pixels with each pixel holding a specific color value.
Bitmap-based files are more suitable for photo-realistic images that require complex color variations. T
hey are, however, not easily scalable because each bitmap-based image is mapped to a non-flexible grid.
If a bitmap-based image were to be enlarged, it would lose its sharpness.
All edges within the image would appear to be jagged.
File names for bitmap-based images usually consist of extensions such as *.PSD, *.JPG, *GIF, *.TIF, or *.BMP.
In general, bitmap-based files require more computer memory for file storage than vector-based files.
The former contains all information for every single pixel of the image while the latter contains only the defining mathematical formulas for each element within the image.
Images can be incredibly powerful tools of communication,
All image files can be categorized into two kinds,
Vector-based files and Bitmap-based
The two differ in the way computers analyze their content.
Vector-based images
Bitmap-based images
In general, bitmap-based files require more computer memory for file storage than vector-based files.
The former contains all information for every single pixel of the image while the latter contains only the defining mathematical formulas for each element within the image.